Ar PHP

Adds Ar-PHP project functionality in TinyMCE editor. New buttons will be added (you can choose which buttons to show) to the new post visual editor, 'Date' button adds the current date, 'Hijri Date' adds the current Hijri date, 'Spell Numbers' converts number into it's equivalent spelling in Arabic, 'Convert Layout' converts English letters into Arabic and vice versa, and 'Transliterate' translates English words into Arabic.